[Versatile Use]:These shelf support pins are designed to fit 18mm-20mm thick wooden and glass shelves,making them a versatile choice for various home or office shelving needs [Quality Material]:Made from durable PC plastic,these shelf support pins are built to last,ensuring long term use and stability for your shelves [Product for Dimensions]:Each shelf support pin measures 5.6cmx1.8cmx2.1cm/2.20inch x 0.71inch x 0.83inch,providing a compact yet sturdy solution for supporting your shelves [Package Contents]:This pack includes 30 shelf support pins,offering ample quantity for setting up multiple shelves or replacing old or lost pins [Easy Installation]:these shelf support pins simple design can be easily installed without the need for professional help